Apparatus for mounting filaments



Feb. 25, 1958 J. o. GEISSBUHLER APPARATUS FOR MOUNTING FILAMENTS 4 Sheets-Sheet 1 Filed Jan. 31, 1950 Invervbor: John O. GeissbuhLev, b5 M 6'- KW His A b lrorneg J. O. GEISSBUHLER APPARATUS FOR MOUNTING FILAMENTS Feb. 25, 1958 4 Sheets-Sheet 2 Filed Jan. 31. 1950 w L UJ e n m e pA 0 .WQHMS w J5 b Feb. 25, 1958 J. o. GEISSBUHLER APPARATUS FOR MOUNTING FILAMENTS 4 Shets-Sheet 3 Filed Jan. 31, 1950 LLiJ I lnven't'or: John O. GeissbuhLer,

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v Feb. 25, 1958 J. o. GEISSBUHLER APPARATUS FOR MOUNTING FILAMENTS 4 Sheets-Sheet 4 Filed Jan. 31, 1950 Inverfior: John O. GeissbuhLer, by Mr. KW

United States Patent APPARATUS FOR MOUNTING FILAMENTS John 0. Geissbuhler, South Euclid, Ohio, assignor to General Electric Company, a corporation of New York Application January 31,1950, Serial No. 141,435

6 Claims. c1. z9 zs.z

sembling it in an incandescent lamp with a particularly high degree of accuracy relative to a reflecting surface of the lamp.

One object of my invention is to achieve consistent accuracy in the manufacture of filament mounts by obviating many difliculties in bending filament support leads to proper form and in attaching said leads to the lamp at positions to properly locate the filament in said lamp. The method is an improvement of the method disclosed in United States Patent 2,317,031-Cotman et al. of April 20, 1943, wherein theleads are attached to the lamp section while they are held at a' predetermined lateral relation to a reference portion of said lamp section. However, in that method the leads are mounted while in a preliminary form and must still be bent to the shape required to hold the filament, with the result that there may be loss in accuracy. Variations in the temper of the leads as well as other not easily controlled conditions are responsible for differences in the bending operation, and I have found that improved results are obtained by attaching the leads to the lamp after being bent to final form, To this end, apparatus is provided for arranging a group of preformed leads at an accurately predetermined relation to the reflector section of a lamp, the apparatus including a portable jig adapted to transfer said group of leads by engagement with the inner end portions thereof which portions aredestined to support the filament. In one form of the apparatus, four leads, which are adapted to support two filaments, are trans ferred to positions to hold both filaments in specific relationship to a reflecting surface of the reflector section of a lamp.

Another object of my invention is to provide a method and apparatus whereby the leads are first arranged in proper relation in the portable jig portion of the apparatus and are then transferred to proper relation to the reflector section of a lamp. The operation is effected through use of the jig in combination with other apparatus with which the jig can be accurately registered, for holding said leads in a prearranged position and, if required, for bending said leads to shape."

A further object of my invention is to provide a method and apparatus whereby a filament may be readily mounted on the leads of the lamp, and the leads, in turn, attached to said lamp at a position to fix the filament at the desired relation thereto. To effect this object, filament mounting apparatus is provided which is adapted to receive the jig and which is, through the cooperative positioning functions of said jig, adapted to mount a filament at a specific position on the leads held by said jig. Corresponding means are provided for receiving and positioningthe jig in the apparatus for preliminarily arranging the leads, theapparatus for bond ing the leads, the filament mounting apparatus and the apparatus for attaching the leads to the lamp to provide the utmost convenience in the handling of the jig.

Still other features and advantages of-.my invention will appear from the following detailed description and from the drawing In the drawing, Fig. l is a perspective view of a lead positioning and bending device comprising my invention with a group of bent leads in place therein and the bend-.

ing die blocks swung back out of position to allow removal of said leads; Fig. 2 is a front elevation of a lead positioning and bending device with the lead transferring jig in place therein; Fig. 3 is a plan view of the stationary die block of the positioning and bending device; Fig. 4

is an end view of the jig on a large scale'with the leads in position therein; Fig. 5 is a plan view of the lead attaching device; Fig. 6 is an irregular vertical section through a center portion of the lead attaching device showing, in combination therewith, a corresponding division of the reflector section of a lamp and a side elevation of a jig holding a group of four leads in: proper relation to said reflector section; Fig. 7 is a perspective view of a portion of the reflector section including one of three groups of positioning bosses at the rim thereof; Figs. 8 and 9 are corresponding plan and side views respectively of a modified lead holding jig and a filament mounting device in cooperative relationship; Fig. 10 is an end view on a larger scale of the modified jig; and Fig. 11 is a perspective view on a still larger scale of the filament positioning rest of the modified device, a filament and the inner ends of leads in proper relation in said device, and the clamping anvils of the said device. The species of my invention disclosed in Figs. 1 to 6, inclusive, of the drawings provides for the bending and preliminary positioning of the four leads 1, 2,3, and 4 of a reflector lamp of the type disclosed in Wright Patent 2,148,314 in the bending device 5 (Figs. 1 and 2) and provides for the transfer of said leads 1, 2, 3, and 4 to proper relation to the reflector section 6 (Figs. 5 and 6) of the lamp by means of the portable jig 7 (Figs. 2 and 6) and the lead-attaching device 8 (Figs. 5 and 6). The leads 1, 2, 3, and 4 are arranged within the reflector section 6 at such positions as to enable the so-called inner ends 9 thereof to support two lamp filaments at very definite relations to the inner (aluminized or silvered) reflective surface 10 of the reflector section 6 and at the same time to allow the opposite or outer ends of said leads 1,' 2, 3, and 4 to be attached to metal thimble terminals 11 of said reflector section 6 by solder or brazing material 12. The positions taken by the said outer ends of the leads 1, 2, 3, and 4 vary slightly in different instances because of variations in the bends therein but these variations are of no consequence since the metallic solder or brazing material 12 completely fills the spaces between said ends and the walls of the thimbles 11 and attaches them thereto in whatever position they may take. The preferred method of fastening the leads 1, 2, 3, and 4 to the reflector section 6 is the same as disclosed in Cotman et al. Patent 2,317,031, which issued April 20, 1943, and assures accurate placement of the inner ends of said leads 1, 2, 3, and 4 regardless of variations in the shape thereof. This method of manufacture is preferred because said variations are extremely difiicult to control since they result from differences in the temper of the material of the leads and various degrees of recovery or spring-back in said leads after they have been bent and differences in the bending operation.

Advantages are presented in the apparatus in that said apparatus enables the group of leads 1, 2, 3, and 4 of one lamp to be handled without ditficulty and tobe arranged Patented Feb. 25, 1958 the leads 1, 2, 3, and 4 initially arranged in means separate, from the reflector section 6, namely, the bending device shown in Figs. 1 and. 2', and by having means (the jig 7) for transferring the leads 1, 2, 3, and 4 to said reflector section 6. The ease. with which the leads 1, 2, 3, and 4 are inserted in the jig 7 is a featureof my invention as is the ease with which the jig 7 can be readily inserted and positioned in the bending and lead attaching devices 5 and 8. Accuracy of positioning is imparted to the jig 7 by having it slidable onto pairs of locating posts 13-14 and 15-16 in the bending and lead attaching devices 5 and 8, respectively, and by having it rest against the respective seating surfaces 17 and 18 when completely inserted in said devices The above-outlined manufacturing procedure is subject to modification in instances when the lead bending operation is not required. In such instances, the bending operation may consist of other operations than those shown or other bending apparatus may be available so that it is more practical and economical to have all or some of said leads bent in other apparatus and to be inserted into lead positioning means corresponding to that afforded by the bending device 5. The advantages of the quick insertion and transfer of the leads 1, 2, 3, and 4 given by use of the jig 7 is therefore retained in the modified form of the invention.

Now in detail and in accordance with the preferred course of operation followed in the use of the apparatus disclosed (Figs. 1-6), the leads 1, 2, 3, and 4 are first inserted end foremost into four spaced openings 19a, 19b, 19c, and 19d (Figs. 1 and 3) in the horizontal upper surface of the stationary die block 20 ofthe bending device 5. As shown best in Fig. 3, the four leads are arranged in triangular formation, with two'of the leads in openings 19a, 19b at one of the corners of the triangle, so as to be located at the approximate positions of the three thimbles 11 of the reflector section 6. The leads 1, 2, 3, and 4 then appear in the form of straight sections of relatively large gauge wire and extend vertically substantially equal amounts above thetop surface of the die-20 because of equal depth and closely confining nature of the openings 19a, 19b, 19c, and 19d.

The function of the bending device 5 is to make two spaced right angle bends in each lead so as to oflset the upper, or inner, ends 9 thereof to positions to hold lamp filaments andis performed by three rotationally movable die blocks 21, 22, and 23 which are forced against the free end portions of the leads 1 and 2, 3 and 4, respectively (die 21 actingon both leads 1 and 2). The motion of the die blocks 21, 22, and 23 first bends the leads 1, 2, 3, and 4 across the top surface of the stationary die 20 and in so doing bends them down into engagement with the upstanding center portion 24 of die 20 and then bends them further along their length by forcing the intermediate free end portion down against adjacent right angle top and side surfaces, respectively, of the main body portion of the die 20 and the upstanding center portion 24 thereof. Each die block 21, 22, and 23 is mounted correspondingly at an eccentric position on the end of a journal 25 retained by a bearing block 26 on the bed plate 27 of the bending device 5, which bed plate 27 also functions as the support for the stationary die 20. Said die blocks are forced against the leads 1, 2, 3, and 4 by a rotative motion of the respective journal 25 effected by manual manipulation of a handle 28 (in some instances only partially shown) extending from the opposite end of saidjournal 25.

As previously noted, the die block 21. has a dual function of bending both of the closely spacedleads 1 and 2 which project from adjacent openings 19a, 19b in the stationary die block 20, and it presents separate offset faces 29 and 30 at slightly different angular relation to engagement with said leads 1 and 2 respectively. The angular relation of the faces 29 and 30 of die block 21 as well as the guiding influence of the angular face 31' of the upstanding portion 24 of the die 20 causes the leads 1 and 2 to be bent in, slightly different directions to the more widely separated vertical grooves 31 and '32 in saidlupstanding center portion 24. The olfset relation of the faces 29 and 30 of die block 21 and the correspondingly offset faces 33 and 34 of said center portion 24 causes said leads 1 and 2 to be bent at different points along their length. Movable die blocks 22 and 23 have similar functions related to the bending of leads 3 and 4, respectively, and are moved so as to press the faces 35 and 36 thereof against said leads 3 and 4 so that they are bent into vertical grooves 37 and 33, respectively, in the adjacent faces 39 and 40, respectively, of the center portion 24 of the die 20.

Following the bending of all four leads 1, 2, 3, and 4, the movable die blocks 21, 22, and 23 are rotated back away therefrom to their retracted position shown in Figs. 1 and 2 where they are clear of the portion of leads 1, 2, 3, and 4 overlying the top surface of the die 20 and cannot interfere with the removal of the leads.

The next operation in the course of manufacture is the first having to do with the transfer of the leads 1, 2, 3, and 4 to the lead-attaching device 8 and consists of inserting the jig 7 into the bending device 5 and at the same time adjusting it so that it passes over the upstanding ends of the leads 1, 2, 3, and 4.

The jig 7 is a portable device having movable and stationary handles 41 and 42, respectively, by which it is manually moved about, and in being inserted into the bending device 5 the jig 7 is moved so that locating posts 13' and 14 of said device 5 enter the hole 43 (Fig. 4) and the groove 44, respectively, of the main body 45 of the jig 7. The arrangement of the jig 7 with respect to the bending device 5 at that time can only be such as to position the lower head end 46 of the jig 7 directly over the ends of the leads 1, 2, 3, and 4 as the jig 7 must be orientated so that the round, and consequently thicker, post 13 passes into hole 43 and the thinner post 14, which has flat surfaces on opposite sides, passes into the groove 44. The downward motion developed in the jig 7 in the insertion thereof lowers the head end 46 so that the upstanding ends of the leads 1, 2, 3, and 4, which have been bent with reasonable accuracy and lie within a restricted area, are directed into separate openings 47a, 47b, 47c, and 47d in said head end 46 by the slightly flared ends thereof.

The manipulation required in the jig 7 to cause it to properly receive the upper ends of the leads 1, 2, 3, and 4 is a squeezing pressure applied to the handles 41 and 42 thereof which pressure causes the clamping pins 48 and 49 in the head end 46 to be withdrawn from a blocking position across the openings 47a-47d, pin 48 blocking openings 47a and 47b and pin 49 blocking openings 47c and 47:1. The squeezing pressure applied to the handles 41 and 42 turns. the handle 41 about the pivot pin 56 in the laterally extending yoke 51 of the head 46 ofthe jig 7 in which it is mounted and moves said handle 41 in a manner causing it to counteract the expansion force of the helical spring 52 located between the upper ends of handles 41. and 42 and causing the lower end thereof to be moved in a direction away from the projecting ends of the clamping pins 48 and 49. The above action of handle 41 has the effect of releasing the pres sure of the spring52 indirectly exertedupon the clamping pins 43 and 49 and allows the expansion force of the respective springs 53, located about mid-portions of said clamping pins 48 and 49 behind the larger size outer ends thereof, toeffect theoutwardwithdrawing movement therein.

The final inserting movement of the jig 7 rests. it upon the seating surface 17 of the fixed bridge 54 over one edge of the die 20 .and' is instrumental in definitely positioningthe jig 7 in that thebridge 54 is mounted upon two spaced upstanding posts 55 at opposite sides of the bed 27 of the device. The bridge 54 also supports and thereby fixes the position of the locating posts 13 and 14. With the jig 7 in full inserted position, the leads 1, 2, 3, and 4 are definitely fixed, in position by the location of their outer (lower) ends in the openings 19a, 19b, 19c, and 19d in the die 20 and the location of their inner (upper) ends 9 in the openings 47 in the head end 46 of said jig 7. The longitudinal position of the leads 1, 2, 3, and 4 is fixed by the engagement of their lower ends with the bottoms of the openings -19a--19d in the die 20.

With the leads 1, 2, 3, and 4 and jig 7 now in a fixed relation, the operator relaxes the squeezing pressure upon the handles 41 and 42, causing the full pressure of the spring 52 to be applied to the clamping pins 48 and 49 through handle 41 and said clamping pins 48 and 49 to be forced in against the leads 1, 2, 3, and 4. Each clamping pin 48 or 49 moves so that its conical inner 'end enters two closely spaced openings 47a, 47b and 47c, 47d, respectively, in the head 46 and presses against the respective pairs of leads 12 and 3-4 therein as shown. Sufficient lateral freedom of movement is allowed in the conically shaped forward ends of the clamping .pins 48 and 49 to permit them to wedge themselves between respective pairs of leads 1--2 and 3-4 and apply equal pressure to each. The pressure of engagement of the clamping pins 48 and 49 is sufficient to keep the leads 1, 2, 3, and 4 frombeing easily pulled and turned from position in the subsequent operation intervals when said jig 7 is removed and inserted in the lead-attaching device 8. v The removal of the jig 7 from the bending device 5 and the insertion of said jig 7 in the lead-attaching device 8 (Figs. 5 and 6) effects the transfer of the group of leads "1,2', 3,and 4 while maintaining their relative position to each other and is effected manually by grasping the handles 41 and 42 of the jig 7. The transfer is brought about by sliding the jig 7 upward off the locating posts 13 and 14 of the bending device 5 and in threading it in a corresponding manner over the upstanding locating posts 15 and 16 of the lead-attaching device 8, which posts are shaped to register properly only with the opening 43 and groove 44, respectively, of the jig. During the transfer of the jig 7, care is exercised not to squeeze the handles 41 and 42 thereof so as to allow the leads 1, 2, 3, and 4 to slip or turn from position and to prevent said leads 1, 2, 3, and 4 from striking parts of the devices and being pushed out of position in the jig 7.

The jig 7 functions both as a means of effecting the ready transfer of the leads 1, 2, 3, and 4 and as a means of holding and fixing the position thereof in the leadattaching device 8 so that said leads are arranged at specific relations to the lamp reflector section 6 retained by said lead-attaching device 8. The inner ends 9 of the leads 1, 2, 3, and 4, which are fixed in position by the jig'7, are caused to take positions enabling them to support light-producing filaments at specific locations with reference to the inner reflecting surface 10 of the reflector section 6 and in that connection depend upon the proper arrangement of the reflector section 6 within the leadattaching device 8 so that the reflective surface 10 thereof has a specific relation to the means for holding the jig 7 in said lead-attaching device 8. The free ends of the leads 1, 2, 3, and 4 are not required to be as definitely located but are required to enter specific thimbles 11 in the reflector section 6 where they can be fixed in position by solder or "brazing material and in that connection require the refiector section 6 to be properly orientated in the leadattaching device 8. The arrangement of the reflective surface 10 and the orientation of the reflector section 6 are both established prior to the insertion of the jig 7 'in the lead-attaching device 8 and are initiated at a prior interval during which the reflector section 6 is slipped into place in the lead-attaching device 8:- j f The reflector section 6 is inserted-in thelead-attachtng device 8 at a time when the centering ring 56 is raised from the position shown and is placed in said device 8 so that the three non-uniformly spaced bosses 57 (Figs.g5, 6, and 7) on the rim thereof are engaged in the deep center notches 58 extending laterally across the pads 59, 60, and 61 about the locating ring 62 and portions of the shorter bosses 63 to each side of each boss 57 are rested upon the shoulders 64 extending across said pads 59, 60, and 61. The engagement of the bosses 57 with the pads 59, 60, and 61 orientates the reflector section 6 in the lead-attaching device 8 in that it is only possible to place said reflector section 6 in said device 8 in one orientated position because of the unequal relative spacing of the bosses 57 thereabout; however, a certain amount of lateral movement can still occur in the reflector section 6 in that the notches 58 in the pads and 61 do not engage the bosses 57 snugly whereas the snug-fitting notch 57 in paid 59 does not limit crosswise movement of the boss 57 it engages. The freedom of movement of the reflector section 6 is relatively restricted and is only allowed to permit the accurate centering of said reflector section 6 during the subsequent operations of the lead-attaching device 8. The shorter pairs of bosses 63 on the opposite sides of the bosses 57 bear a definite relation to the plane ofthe rim of the reflector section 6 and in their corresponding engagement with the shoulders 64 on each of the pads 59, 60, and 61 fix the level of said reflector section 6 in the lead-attaching device 8 and the axial alignment of the said reflector section 6.

Final fixation of the reflector section 6 in the lead-,

attaching device 8 occurs when the overlying centering ring 56 and the locating ring 62 are brought closer together to the position shown in Fig. 6 where three equidistantly spaced rollers 65 supported by said centering ring 56 engage the reflective surface 10 of the reflector section 6 and, by their pressure of engagement, center said reflector section 6 upon the locating ring 62. The rollers 65 are mounted on slotted blocks 74 which are attached to the lower surface of ring 56 by bolts 74. In the presently disclosed device, the locating ring 62 is stationary and is mounted at a particular height above the bed plate 66 of the device by means of a plurality of posts 67 engaging a sideward projecting portion thereof. The centering ring 56 is the movable element in the combination and is arranged so as to be slidable upon the tubular column 68 held by the locating ring 62 and is prevented from turning around the column 68 so as to be fixed in definite alignment therewith by the engagement of a portion thereof with the solid column 69 mounted in a further extension of the locating ring 62. Movement is produced in the centering ring 56 by means (not shown) below the bed plate 66 which actuates the rod 70 vertically within thetubular column 68 and is transferred to the centering ring 56 by cross pin 71 extending through opposed slots 72 in the column 68 and the nut 73 on the rod 70. Normal operative procedure requires the centering ring 56 to be pressed downward sufliciently to keep the three equidistantly spaced rollers 65 properly seated The downward pressure of the centering ring 56 'is maintained during the following operative intervals when the jig 7' is introduced into the lead-attaching device and the leads 1, 2, 3, and 4 are mounted in the reflector section 6.

Insertion of the jig 7 into the lead-attaching device 8 is accomplished by causing the opening 43 and groove 44 in the body 45 of said jig 7 to register with the locating posts 15 and 16, respectively, and by sliding said jig 7 downward thereon until said body 45 is rested upon the seatingsurface '18 of the bracket 75 forming the support for said posts 15 and 16. This operation threads the more widely spaced portions of ,the leads 1, 2, 3, and 4 extending from the jig .7 :down through openings 76 at .the center portion or apex of the reflector section 6 and into the metal thimbles 11 sealed over said openings 76 at the limit of the movement of the jig 7 the leads 1,2, 3, and 4 are still spaced from the walls of the thimbles 11 asshown. The position taken by the ends of the leads 1,2, 3, and 4 with respect to the .thimbles 11 can vary with succeeding lamps manufactured inasmuch as the opposite (inner) ends 9 of said leads 1, 2, 3, and 4 are definitely positioned by the jig 7 and all variations in the shape thereof displace the lead ends in said thimbles 11. The ends of two leads land 2 enter a single thimble 11 and therefore limitthe amount of variation that can occur in that'instance; however, the space in the openings 76 in the reflector section 6 and the end portions '77 of the thimbles 11 is suflicientlylarge to accommodate all leads 1, 2, 3, Land 4 of normal variation. In no instance should a lead 1, 2, 3, and 4 touch and press against the wall of the reflector section 6 or the side wall of a thimble 11 since the lead would then be attached to the thimbles 11 in a stressed condition and the inner end now held by the jig 7 would spring to a different position with relation to the reflector section 6 when said jig 7 was separated therefrom. It will be appreciated that what is important in this matter is that there be no substantial pressure exerted on the ouer ends of the leads as this would prestress the leads and cause spring-back.

The leads 1, 2, 3, and 4 are attached to the thimble 11 by melting pellets of high-temperature melting solder material in the thimble cavities so that a fluid form of the solder flows down around the ends thereof without disturbing their position. A flux, also introduced into the thimbles 11 with the solder pellets, causes the solder to readily wet to the leads 1, 2, 3, and 4 and the thimbles 11 and'causes a secure and strong bond to be made therebetween which will hold said leads 1, 2, 3, and 4 rigidly in place when solder cools.

The 'solder pellets are melted by heat introduced into the projecting end portions 77 of the thimble 11 by a plurality of jet-like flames directed thereagainst by a corresponding number of burners 78 located below the center of the reflector section 6 in the fixed block 79 on the bed 66 of the lead-attaching device 8. Each burner 78 surrounds the projecting end portion 77 of a thimble 11 and develops flames by the discharge of combustible gas from openings 80 between the inner shell 81 thereof and the overhanging lip of the outer shell 82 thereof which are fed from an external source (not shown) through the pipe connection 83 and the manifold provided by the space between said inner and outer shells 81 and 82. The openings 84 in the lower portion of the burners 78 function as vents to allow the influx of air into the center thereof and the circulation of said air about the thimbles 11 after the gas supply is valved olf and the flames die out at the end of the cycle of operation to cause the solder to congeal. At this time, the jig 7 is removed .from the lead-attaching device 8 by first withdrawing the clamping pressure on the leads 1, 2, 3, and 4 and then by slipping said jig 7 upward off the locating posts and 16 by manual engagement with the handles 41 and 42 thereof. The lead-attaching device 8 is prepared for another. cycle of operation by raising the centering ring 56 and removing the reflector section 6 therefrom.

The next step in the manufacture of the lamp is the mounting of filaments on the inner ends 9 of the leads 1, 2, 3, and 4 and is performed by transferring the reflector section 6 to a mounting machine of the type disclosed in Flaws Patent 2,297,950, dated October 6, 1942. The above referred to mounting machine provides means for holding the reflector section 6 at a definite position and means for mounting the filaments at a predetermined irelation to said means and accordingly to the reflector section 6. The means for holding the reflector section 6 position taken by the opposite ends.

8 in the ,filament mounting machine engages the reflector section 6 in the manner of the lead-ataching device 8.

Lamp manufacturing procedures may in still other .instances make it desirable to combine the above-described apparatus with other manufacturing apparatus to recover the fullest advantage thereof. A combination assuring event greater accuracy in the mounting of the leads is a combination of the focus-finding device disclosed in Westerlund Patent 2,324,449, dated July 13, 1943, which is assigned to the assignee of the instant invention, and the lead-attaching device 8. In such a combination, the means for holding and positioning the jig 7 is at a definite relation to the focus-finding means and both the centering ring 56 and the locating ring 62 are adjustable with relation thereto as is corresponding means in said focusfinding apparatus. In still other instances, it may be desirable to combine the apparatus of the present invention with focus-finding apparatus and with other mountmaking apparatus in the manner disclosed in Flaws Patent 2,297,950, dated October 6, 1942, wherein the reflector section 6 is advanced to working relation to portions thereof in turn by successive indexing movement thereof. In such a combination of apparatus, the jigholding and positioning means are advanced by a carrier in the manner of the reflector section-holding means shown and heating means for melting the solder is located at one or more of the stations in the manner of other well-known lamp-making apparatus. It is preferred that said leads be carried into the prior disclosed apparatus by means of the jig after the reflector section is properly positioned therein to avoid interference of said jig with the focus-finding operations. The apparatus disclosed by the Flaws patent also provides for the mounting of filaments at definite positions on the leads extending from a reflector section and is also desirable apparatus in the combination in that its use reduces the handling of the reflector section and possible loss in accuracy in manufacturing the lamp.

The herein-described manner of mounting the leads 1, 2, 3, and 4 in the reflector section 6 and then mounting the filaments thereon is also subject to modification. A filament can, for instance, be attached to the leads of the lamp while said leads are still separate from the reflector section 6 but are fixed in a definite relation to each other by being held by the jig. Such a manner of operation is performed by the apparatus disclosed in Figs. 8, 9, l0 and ll wherein the jig 7' is shown holding a pair of leads 85 and 86 in a definite positon within the mounting device 87. The leads 85 and 86 have been bent to shape, preferably in a device of the type disclosed in Figs. 1 and 2, and have been transferred to the filament mounting device 87 by the jig 7' which fixes their position by engagement with portions of the inner ends 88 while leaving other portions of said inner ends 88 free to receive a filament. The jig 7' engages the leads 85 and 86 through the offset faces 98 (Fig. 10) of the anvil 91 of the fixed portion 92 of the head end thereof and the oppositely offset faces 93 of therocking anvil 94 within the hollow in the movable portion 95 of said head end and grips portions of the inner ends 88 of the leads 85 and S6 adjacent laterally offset portions 88 (Fig. 8) thereof. The length of the leads 85 and 86 is such that the remainder (or extremities) of the mner ends 88 thereof lie in a central opening 96 in the head end of the jig 7 and are accessible for the mounting operations whereas the opposite ends thereof extend beyond the end of the jig 7'. Grooves 97 within the offset faces 93 of the rocking anvil 94 fix the relation and alignment of the inner ends 33 of the leads 85 and 86 whereas the grooves 93 and 99 on the plate 100 attached to the fixed portion 92 of the head end of the jig 7' engage the laterally-extending portions 33 of the leads 85 and 86and fixthe orientation of the inner ends and consequently the The longitudinal position of the leads 85 and 86 is determined by the .manner of insertion of said leads in the jig 7 however, in this particular instance, it is such that the lateral intermediate portions 88' of the leads 85 and 86 .bear against the bases 'of the grooves 98 and 99 and the adjacent shoulder 101 of the plate 100. The pressure of engagement with the leads 85 and 86 is developed in the jig 7 by the expansion force of the spring 102 located between the fixed and movable handles 103 and 104, respectively, and is transferred to the anvil 94 through the attachment of the opposite end of the movable handle 104 to the movable portion '95 of the head end of said jig 7 and the presence of the ball bearing 105 located between said movable portion 95 and the anvil 94. The springs 106 in the wells in the adjoining faces of the anvils 91 and 94 keep the anvil 94 pressed against the ball bearing 105 at all times and together with the ball bearing 105 permit sufiicient rocking movement in the anvil 94 to cause it to engage both leads 85 and 86 with equal pressure. The fixed portion 92 of the head end of the jig 7' and fixed handle 103 are attached directly to the body 107 of said jig 7' which provides, in the pin 108 in the upstanding yoke 108', a pivot for the movable handle 104.

When the mounting device 87 is at the point in its operative cycle in which it is shown, the jig 7' is being held and fixed in position by the location of the body 107 thereof within snug-fitting longitudinal slide ways 109' in the upper surface of the carriage block 109 and by the arrangement of said body 107 in said slide ways so as to butt against the stop screw 110 in a lug at one end of the carriage block 109. Previously, the carriage block 109 had been slid transversely across the top surface of the bed 111 of the mounting device 87 and along the key 112 thereon to a position where it butts against the stop plate 113 at one end of the key 112. In other words, the position occupied by the jig 7' in the drawing is that taken in an intermediate step in the operation of the device 87 and is preceded by movements carrying it laterally across the bed 111 (as just described) to its present position between the clamping jaws 114 and 115 and longitudinally of the bed 111 (along block 109) to its present position in relation to the filament 116 located upon the upstanding rest 117 on said block 109. The jig 7' is placed in the carriage block 109, when said block 109 is located to one side of the clamping jaws 114 and 115 and is free of any interference therefrom, and is placed at a position in the carriage block 109 causing the filament 116 to appear in the open center 96 in the head end of said jig 7' and the inner ends 88 of the leads 85 and 86 to be spaced from the legs 118 and 118' of said filament 116.

The initial operation in the method of manufacture is preferably the insertion of the coiled mid-portion of the filament 116 into the pocket 120 (Fig. 11) in the top edge :of the upstanding rest 117 at one end of the carriage block 109. The filament 116 is arranged so that the leg 118 which extends longitudinally and then laterally from one 'end of the coiled center portion thereof is rested against and fix the lateral position of said filament 116 on said 'rest 117. The next operation, following the insertion of the filament116, is the introduction of the jig 7' and con- 'sists in arranging said jig 7' over carriage block 109 in a 1 position where the opening 96 therein is over the rest 117 and where the inner ends 88 of the leads 85 and 86 are offset endwise from the filament legs 118 and 118'; and "then in lowering said jig 7 until the body 107 thereof is -rested in the slide ways of the carriage block 109. The "manner of inserting the jig 7 locates the leads 85 and 86 opposite the legs 118 and 118 of the filament 116.

The body 107 of the jig 7 as shown in Fig; is also adapted to fix the position of said jig 7 in bending and a 10 lead-attaching devices in the. manner of the previously described jig 7 in that it is provided with an opening 124 and groove 125 for registry with means-in said devices corresponding to posts 13, 14 ,(Fig. 1) and 15, 16 (Fig. 6). The end face 126 of the body 107 is at a relation to the head end of the jig 7' to cause the jig 7' to be arranged properly in the bending and lead-attaching de vlces. 1

The next operation consists in sliding jig 7 toward the stop screw at the end of the carriage block 109; a motion which threads the legs 118 and 118 of the filament 116 into the longitudinal grooves or notches 127 in the ends of the leads 85 and 86 and establishes a definite relation between said leads 85 and 86 and the filament 116. The next operation consists in. pushing the carriage block 109 along the key 112 and across the .bed 111 of the mounting device 87 to carry the jig 7 and the properly arranged filament 116 and the leads 85 and 86 between the clamp jaws 114 and and is complete when said block 109 engages the stop plate 113 at which time said filament 116 and leads 85 and 86 are at operative relation to said jaws 114 and 115.

The manufacturing method now calls for the clamping jaws 114 and 115 to close on the inner ends 88 of the leads 85 and 86 and thereby squeeze said ends 88 to an extent that the notches 127 therein are closed around the legs 118 of the filament 116 without injury thereto and that a permanent connection is made therebetween. The closing movement of the clamping jaws 114 and 115 is brought about manually by moving the upper end of the handle 128 from right to left to force the wedgeshaped end 129 of the slide 130 between the rollers 131 on the ends of the clamping jaws 114 and 115, and thereby force the anvils 132 and 133 on the opposite ends of said jaws against the leads 85 and 86. At the moment of initiation of the operation, the handle 128, which is pivoted on a pin 134 bridging a slot in the bed 111, rests against the upper end of the post 135 mounted on said bed 111 and, through engagement with the roller 136 on a pin 137 projecting from the side of the slide 130, keeps said slide 130 withdrawn to the right in the ways of the stationary block 138 on the upper surface of j the bed 111 and the wedge-shaped end 129 out of contact with the jaw rollers 131. The jaws 114 and 115, at such times, are turned to an open position on the pivot pins 139 in the upstanding yoke 140 on the bed 111 because of the contraction force of a helical spring 141 extending between posts on the jaws. The clamping movement of the handle 128 first brings the sharply tapered portion of the end 129 of the slide 130 against the rollers 131 to effect a rapid movement of the jaws 114 and 115 and advance the anvils 132 and 133 into the opening 96 of the jig 7, and then brings the less sharply taperedportion 142 of said end 129 against said rollers 131 to cause the off-set end surfaces 143-144 and 145-146 of the anvils 132 and 133, respectively, to engage the leads 85 and 86 with sufiicient pressure to flatten said leads 85 and 86. The clamping operation is complete when the handle 128 is moved to" an extent where it bears against the stop screw 147 in the post 148. Following the clamping operation, the handle 128 is moved back to the right and the jaws 114 and 115 again turn about their pivot pins 139 in the upstanding yoke 140 to a separated position giving clearance for the lateral withdrawal of the jig 7'. The relation of the .leads 85 and 86 and the filament 116 remains undisturbed are correspondingly offset and the clamping surfaces "143-144; and 145146 of the anvils 132 and 13s,

Jon the rest 117 have corresponding positions.

The accurate arrangement of the leads 85 and 86 and filament 116 after the clamping operation permits the jig 7 to be used to transfer these parts to the desired mounting relation to the reflector section of a lamp in the manner already described in detail with reference to jig 7. The operations required to effect this transfer with reference to jig 7' are only those required to remove it from the clamping device and then properly thread the device 7' into the locating means of the lead-attaching device. The jig 7 is removed from the clamping device 87 by sliding the carriage block 109 and jig 7' sideward away from the clamping jaws 114 and 115 and then lifting the jig 7 vertically to extract it and the filament 116 from the confines of the slide ways in the carriage block 109 and the pocket 120 in the rest 117 thereof, respectively. The jig 7' can be rocked to lift the filament 116 from the pocket 120 by pressure upon the handles 103 and 104; however, care must be taken not to move the handle 104 and loosen the grip of the jig 7' on the leads 85 and 86. The proper arrangement of the jig 7' with the lead-attaching device 8 is effected by manipulating said jig 7' so that the locating posts and 16 enter the opening 124 and groove 125, respectively, and the end surface 126 thereof comes to rest on the seating surface 18 of device 8.

Although preferred embodiments of my invention have been disclosed, it will be understood that the invention is not to be limited to the specific construction and arrangement of parts shown but that these parts may be widely modified within the spirit and scope of my invention as defined by the appended claims.

What I claim as new and desire to secure by Letters latent of the United States is:

1. Apparatus for assembling a filament mount on a reflector section of an incandescent lamp bulb having a group of thimble-like terminals secured thereto comprising a jig having apertures therein for receiving the inner end portions of leads in definite predetermined spaced relationship to support a filament and having passages intersecting said apertures, movable pins located Within said passages, releasable spring-pressed means on the jig for forcing the pins toward the apertures therein for clamping the leads in said apertures, a holder for supporting the reflector section of the lamp in an accurate predetermined position, means on said holder for receiving and accurately fixing the position of the jig thereon to cause the inner end portions of the leads to be arranged in definite predetermined relationship to the reflecting surface of the reflector section with the opposite .outer end portions of said leads disposed withinsaid terminals but out of contact therewith, and means associated with the holder for effecting the attachment of the outer end portions of the leads to the said terminals of thereflector section.

2. Apparatus for assembling a filament mount on a reflector section of'ran incandescent lamp bulb having a group of thimble-like terminals secured thereto comprising a jig having two pairs of closely spaced apertures therein for receiving the inner end portions of leads in definite predetermined spaced relationship to support filamerits and having two passages each located between and intersecting one pair of said apertures, movable pins with conical ends located within the said passages, releasable spring-pressed means on the jig for forcing the pins longitudinally through the passages to cause opposite sides of the conical ends thereof to engage and clamp respec- 'tive pairs of leads in said apertures, a holder for supporting the reflector section .of the lamp in an accurate predetermined position, means on said holder for receiving and accurately fixing the position .of .the jig thereon to cause the .inner end portions of the leads to .be

arranged in definite predetermined relationship to the 12 reflecting surface of the refiector section with the opposite outer end portions of said leads disposed within said terminals but out of contact therewith, and means associated with the holder for effecting the attachment of the outer end portions of the leads to the said terminals of the reflector section.

3. Apparatus for assembling a filament mount on a reflector sect-ion of an incandescent lamp bulb having a group of thimble-like terminals secured thereto comprising a bending jig including a die with spaced openings in a horizontal surface thereof for receiving the lower end portions of a group of vertically disposed leads and having an upstanding portion with vertically grooved faces spaced along said surface from said openings, said bending jig further including movable die blocks and means mounting the die blocks for movement over the openings in the die toward respective faces of the said upstanding portion thereof to bend portions of the leads extending beyond the openings in the die across the said horizontal surface and into the said grooves in the upstanding die portion, a transfer jig arranged to securely grasp and hold only the upper end portions of the leads projecting from said grooves in definite predetermined spaced relationship to support a filament, cooperating engagement means on the bending jig and transfer jig for fixing the position of the transfer jig on said bending jig to cause said transfer jig to pick up the group of leads by their upper end, a holder for supporting the reflector section of the lamp in an accurate predetermined position, cooperating engagement means on said holder and said transfer jig for accurately fixing the position of the transfer jig in predetermined relation on said holder to cause the upper end portions of the leads to be arranged in definite predetermined relationship to the reflecting surface of the reflector section with the lower end portions of said leads disposed within said terminals but without the exertion of any substantial pressure on said leads, and means associated with the holder for effecting the attachment of the lower end portions of the leads to the said terminals of the reflector section.

4. Apparatus for assembling a filament mount on a reflector section of an incandescent lamp bulb having a group of thimble-like terminals secured thereto comprising a jig arranged to securely grasp and hold only the offset inner end portions of preformed leads to hold them in definite predetermined spaced relationship to support a filament, filament mounting means including means for holding a filament at a definite position, cooperating engagement means on said filament mounting means and said jig for fixing the position of the jig definitely on said mounting means to cause the inner end portions of the leads to be juxtaposed with end portions of the filament, means also mounted on the filament mounting means for attaching the filament to the leads, a holder for supporting the reflector section of the lamp in an accunatepredetermined position, cooperating engagement means .on saidholder and said jig for fixing the position of the jig in predetermined relation on said holder to cause the filament to be arranged in definite predetermined relationship to the reflecting surface of the reflector section with the opposite outer end portions of said leads disposed within said terminals but without the exertion of any substantial pressure on said leads, and means associated with the holder for effecting the attachment of the outer end portions of the leads to the said terminals of the reflector section.

5. Apparatus for assembling a filament mount on a reflector section of an incandescent lamp bulb having a group of thimble-like terminals secured thereto comprising a jig arranged tosecurely grasp and hold only the :offset inner endportionsof preformed leads torhold them member having a pocket for holding and positioning the coiled mid-portion of a filament and having adjoining shoulder portions for fixing the position of the ends of the filament extending beyond the rest member, cooperating engagement means associated with the rest member and said jig for positioning the jig definitely with respect to the rest member to cause the inner end portions of the leads to be juxtaposed to the filament ends, and means mounted on said filament mounting means for attaching the filament ends to the leads in their assembled positions, a holder for supporting the reflector section of the lamp in an accurate predetermined position, cooperating engagement means on said holder and said jig for fixing the position of the jig in predetermined relation on said holder to cause the filament to be arranged in definite predetermined relationship to the reflecting surface of the reflector section with the opposite outer end portions of said leads disposed within said terminals but without the exertion of any substantial pressure on said leads, and means associated with the holder for effecting the attachment of the outer end portions of the leads to the said terminals of the reflector section.

6. Apparatus for assembling a filament mount on a reflector section of an incandescent lamp bulb having a group of terminals secured thereto comprising a bending jig including means to hold outer end portions of a group of leads in the same arrangement as said terminals and also including means to bend the inner ends of said leads 14 to a predetermined offset position to receive a filament, a transfer jig arrangement to securely grasp and hold the leads only by the extremities of the inner portions thereof and in the said predetermined relationship cooperating engagement means on the said bending jig and transfer jig for accurately fixing the position of the transfer jig on said bending jig to cause said transfer jig to pick up the group of leads by their inner ends, a holder for supporting the reflector section of the lamp in an accurate predetermined position, cooperating engagement means on said holder and said transfer jig for accurately fixing the position of the transfer jig in predetermined relation to said holder to cause the inner end portions of the leads to be arranged in definite predetermined relationship to the reflecting surface of the said reflector section with the said outer end portions of said leads disposed within said terminals but without the exertion of any substantial pressure on said leads, and means associated with the holder for effecting the attachment of the outer end portions of 20 the leads to the said terminals of the reflector section.

References Cited in the file of this patent UNITED STATES PATENTS 25 2,297,950 Flaws Oct. 6, 1942 2,317,031 Cotman et al Apr. 20, 1943 2,324,449 Westerlund July 13, 1943 

